$ git clone -n https://src.fedoraproject.org/rpms/perl-pip.git /var/lib/mock/f45-build-27733-625/root/chroot_tmpdir/scmroot/perl-pip
Cloning into '/var/lib/mock/f45-build-27733-625/root/chroot_tmpdir/scmroot/perl-pip'...
$ git fetch origin 887f06a8c8f47830f8e955261be8b360276a6d1f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-pip
 * [new ref]         887f06a8c8f47830f8e955261be8b360276a6d1f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 887f06a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild